Mine-car brake.



I. GLEN.

MINE GAR BRAKE.

APPLICATION FILED JAN. 25, 1909.

Patented June 1, 1909.

aktoznmsd 2 m 3 v 6 m 9 FIL "W m a 2 .1 x m m a f MW U:1 r 6 M. we m mmY Y W a W Z ISAAC GLEN, or TRAFFORD CITY, PENNSYLVANIA.

MINE-CAB BRAKE Specification oi. Letters Patent.

Patented June 1, 1909.

Application filed January 25, 1909. ,Serial No. 474,105.

To all whom it may concern:

Be it known that I, Isaac GLEN, a citizen of the United States, residingat Trafford City, in the county of lVestmoreland and State ofPennsylvania, have-invented certain new anduseful Improvements in Mine-C'ar Brakes, of which the following is a speci fication.

This invention relates to brakes of the class particularly designed forusein connection. with mine cars.

The invention resides essentially in certating the application of thebrake to mine cars, and possessing other advantages to be more fully setforth hereinafter.

For a full understanding of the invention reference is to be had to thefollowing detail description and to the accompanying drawings, in whichF igi ire 1 is a side elevation of a mine car showing brake mechanismembodying the invention. applied thereto; Fig. 2 is a 'bottom plan view;Fig. 3 is a vertical central section, and Fig. 4 is a detail fragmentaryview showing more'clearly the spring connecting the brake shoes.

Throughout the following detail description and on the several figuresof the drawings similar parts are referred to by like 1 referencecharacters.

Referring particularly to the drawings and. describing the details ofconstruction of the invention the numeral 1 denotes any Ordinary type ofmine car mounted on the wheels 2 and on which is arranged the brakemechanism comprising the invention. Said mechanism consists of a pair ofbrake shoes mally tend to gravitate away from the wheels 2, but toeffectquick release of the brake mechanism springs 7 may be employed,Each spring 7 is curved so that its ends pass through openings in lugs 8on the rear edges of each pair of links 6, the tendency of the springbeing to force the links toward each other, and move the brake shoes 3out of contact with the wheels 2. The springs 7 are preventedfrom'upward displacement by the bosses 9 on the plates 5, and from whichproject the studs l. The means for actuating the brake shoes 3 in orderto apply the brake mechanism includes a transverse operating shaft 10mounted in suitable bearings rovided by plates 11 secured to the bottomof the car. The shaft 10 has its ends squared so as to receive thereoncam heads 12 adapted to operate between the sets of brake shoes atopposite sides of the car. One of the ends of the shaft 10 is extendedso as to receive thereon an arm 13 connected by a bar 1 1 with a handlever 15. The lever 15 is held in adjusted positions by a suitable rack16 such as commonly used for this purpose.

The heads 12 onthe shaft 10 are detachable and reversible, said headsbeing provided atv the middle portions with intersecting squareopenings. Furthermore, the heads are formed with sets of opposite camsurfaces 12 and 12", see Fig. 2. lVhen one set of surfaces 12 forinstance has been worn considerably by engagement with the shoes 8, itwill be apparent that by reversing the head 12 bringing the othersetofcam surfaces into cooperation with the brake shoes, the life of theheads will be prolonged materially.

As noted before the shaft 10 is preferably made in two partstelescopically connected as shown at 10", and adapted to be held atdesired adjustments by a pin or other member 17. The shaft 10 byadjustment maybe readily applied to cars of different widths. In theoperation of the invention the lever 15 may be moved to partly rotatethe shaft 10 and this action turns the cam heads 12 causing the latterto apply the brake shoes 3 to the wheels 2 with great force in anevident manner.

Having thus described the invention, what is claimed as new, is:

1. In combination with a mine car embodying front and rear Wheels, brakeshoes between said wheels, a transverse shaft mounted on the car andhaving an, end thereof extending between said brake shoes, a detachablecam head mounted on said end of the shaft and having a plurality ofopenings each of which is adapted to receive the shaft end, said headhaving also a plurality of cam surfaces to engage the brake shoes andreversible by passing the end of the shaft through a certain one of theintersecting openings, and means. foroperating the shaft.

2. In combination with a car embodying spaced supporting wheels,brakemechanism including brake. shoes between said wheels and atransverse shaft having a squareend, a cam head having intersectingsquare openings each adapted to receive the shaft end, and also havingreversible cam surfaces corresponding to the openings and adapted forcontact with'the brake shoes, and operating means for turning the shaftto impart movement to the cam heads and brake shoes.

8. In combination with a car embodying spaced supporting wheels, brakemechanism including brake, shoes between said wheels 'and .atransverseshaft havingasquare end,a cam head having intersecting square openingseach adapted to receive the shaft end, and also having reversiblecamsurfaces corresponding to the openings and adapted for contact with thebrake shoes, operating means for turning the shaft to impart movement tothecam heads and brake shoes,

links supporting the brake shoes, a bracket plate pivotally connectingthe links to the car, and a s ring connecting the links together to e'ect quick release of the brake mechanism and prevented fromdisplacement by the bracket plate supporting said links.

4. In combination with a car embodying front and'rear wheels, brakeshoes therebetween, a transverse two-part shaft mounted on the car, areversible detachable cam head mounted on each end of the shaft andhaving corresponding reversible cam sur faces to engage the brake shoes,means for turning the shaft to actuate the cam heads and apply the brakeshoes to the wheels, and means for holding the two parts of the shaft inadjusted positions to adjust the relative positions of the cam headscarried thereby. V

In testimony whereof I affix my signature in presence of two witnesses.

ISAAC GLEN.

Witnesses STEWART McKee FRESHWATER, DAVID R. FRESI-UVA'IIER.

